Inzwa ye-oxygen yemoto.
Inzwa ye-oxygen yemoto iyinzwa esemqoka yempendulo ohlelweni lokulawula injini ye-EFI, futhi iyingxenye ebalulekile yokulawula ukukhishwa kwegesi yemoto, ukunciphisa ukungcoliswa kwemvelo yemoto kanye nokwenza ngcono ikhwalithi yokushiswa kukaphethiloli yenjini yemoto.
Kunezinhlobo ezimbili zezinzwa zomoya-mpilo, i-zirconia ne-titanium dioxide.
Inzwa ye-oksijeni ukusetshenziswa kwezakhi ezibucayi ze-ceramic ukukala amandla komoya-mpilo ezithandweni zokushisa ezihlukahlukene noma amapayipi okukhipha umoya, ukubala ukuhlushwa komoya-mpilo okuhambisanayo ngesimiso sokulinganisela kwamakhemikhali, ukuqapha nokulawula isilinganiso sokushiswa komoya-kaphethiloli esithandweni somlilo, ukuze kuqinisekwe. ikhwalithi yomkhiqizo kanye nezindinganiso zokukhishwa kwe-exhaust yezinto zokulinganisa, ezisetshenziswa kabanzi kuzo zonke izinhlobo zokuvutha kwamalahle, ukusha kukawoyela, ukushiswa kwegesi nokunye ukulawulwa komkhathi wesithando somlilo.
Inzwa ye-oxygen isetshenziselwa ukulawula nge-elekthronikhi isistimu yokulawula impendulo yedivayisi yomjovo kaphethiloli ukuze kutholwe ukugcwala komoyampilo kugesi ephumayo kanye nokuminyana kwesilinganiso sikaphethiloli womoya, ukuqapha isilinganiso sethiyori somoya-fuel (14.7:1) enjinini, kanye nokuthumela amasignali empendulo kukhompuyutha.
Isimiso sokusebenza
Inzwa yomoya-mpilo isebenza ngendlela efanayo nebhethri, kanye ne-elementi ye-zirconia esenzwa esebenza njenge-electrolyte. Umgomo oyisisekelo wokusebenza uthi: ngaphansi kwezimo ezithile (ukushisa okuphezulu kanye ne-platinum catalysis), umehluko wokuhlushwa komoyampilo phakathi kwengaphakathi nangaphandle kwe-Hao oxide usetshenziselwa ukukhiqiza umehluko ongaba khona, futhi uma umehluko omkhulu wokugxilisa ingqondo, umehluko omkhulu ongaba khona. . Okuqukethwe komoyampilo emkhathini kungama-21%, igesi yokukhipha umoya ngemva kokuvutha okugxilile empeleni ayinawo umoya-mpilo, futhi igesi yokukhipha umoya ekhiqizwe ngemva kokushiswa kwengxube ye-dilute noma igesi yokukhipha umoya ekhiqizwa ukuntuleka komlilo iqukethe umoya-mpilo owengeziwe, kodwa usengaphansi kakhulu kunomoya-mpilo osemkhathini.
Ngaphansi kwe-catalysis yokushisa okuphezulu ne-platinum, umoya-mpilo oxhunywe kwinzwa ye-oxygen uyadliwa, ngakho umehluko we-voltage uyakhiqizwa, i-voltage ephumayo yengxube egxiliwe iseduze ne-1V, futhi ingxube ye-dilute iseduze ne-0V. Ngokuvumelana nesignali ye-voltage yenzwa ye-oxygen, isilinganiso se-air-fuel silawulwa ukuze kulungiswe ububanzi be-pulse umjovo kaphethiloli, ngakho-ke ukulawulwa kwe-elekthronikhi kwenzwa ye-oxygen iyinzwa eyinhloko yokulinganisa uphethiloli. Inzwa ye-oxygen ingabonakala ngokugcwele emazingeni okushisa aphezulu (ukuphela kufinyelela ngaphezu kuka-300 ° C) futhi ingakhipha i-voltage. Isabela ngokushesha kakhulu ekushintsheni kwengxube cishe ku-800 ° C.
Amathiphu
Inzwa ye-oxygen ye-zirconium dioxide ibonisa ukuguqulwa kokugxila kwengxube evuthayo ngokushintsha kwamandla kagesi, futhi inzwa ye-oxygen ye-titanium dioxide ibonisa ukuguqulwa kwengxube evuthayo ngokushintsha ukumelana. Isistimu yokulawula ye-elekthronikhi esebenzisa inzwa ye-oxygen ye-zirconia ayikwazi ukulawula isilinganiso sangempela sikaphethiloli womoya eduze nesilinganiso sethiyori yomoya-fuel lapho isimo sokusebenza kwenjini siwohloka, kuyilapho inzwa ye-oxygen ye-titanium dioxide ingakwazi futhi ukulawula isilinganiso sangempela sikaphethiloli womoya eduze nethiyori. isilinganiso sikaphethiloli womoya lapho isimo sokusebenza kwenjini siwohloka.
Ivolumu yomjovo (ububanzi be-injection pulse) elungiswa yiyunithi yokulawula ngesikhathi esifushane ngokusho kwesignali yenzwa ye-oxygen ibizwa ngokuthi ukulungiswa kwe-fuel term-term, okulawulwa yi-voltage ephumayo yenzwa ye-oxygen.
Ukulungiswa kukaphethiloli kwesikhathi eside yinani elinqunywa ukuguqulwa kweyunithi yokulawula yesakhiwo sedatha yokusebenza yeyunithi ngokuya ngoshintsho lwe-coefficient yokulungisa uphethiloli yesikhashana.
Iphutha elivamile
Lapho inzwa ye-oxygen ihluleka, ikhompyutha yesistimu yomjovo kaphethiloli we-elekthronikhi ayikwazi ukuthola ulwazi lokuhlushwa komoya-mpilo epayipini lokukhipha umoya, ngakho-ke ayikwazi ukulawula isilinganiso se-air-fuel, okuzokwandisa ukusetshenziswa kukaphethiloli we-injini kanye nokukhipha ukungcola, futhi injini izovela isivinini esingazinzile sokungenzi lutho, ukuntuleka komlilo, ukuqhuma nezinye izenzakalo zephutha. Ngakho-ke, iphutha kufanele lisuswe noma lishintshwe ngesikhathi esifanele [1].
Iphutha lobuthi
Ubuthi benzwa ye-oksijini buvame futhi kunzima ukuvimbela ukwehluleka, ikakhulukazi ukusetshenziswa njalo kwezimoto zikaphethiloli onomthofu, ngisho nenzwa entsha ye-oxygen, ingasebenza kuphela amakhilomitha ayizinkulungwane ezimbalwa. Uma kuwubuthi obuncane bomthofu, khona-ke ukusebenzisa ithangi likaphethiloli ongenawo umthofu kungasusa umthofu ebusweni benzwa yomoya-mpilo futhi kuwubuyisele ekusebenzeni okuvamile. Kodwa-ke, ngokuvamile ngenxa yokushisa okuphezulu kwe-exhaust, umthofu ungena ngaphakathi kwawo, uvimbela ukusakazeka kwama-ion oksijini, okwenza inzwa ye-oxygen ingasebenzi, ngaleso sikhathi ingashintshwa kuphela.
Ngaphezu kwalokho, ubuthi be-silicon bezinzwa zomoya-mpilo nakho kuyisenzakalo esivamile. Ngokuvamile, i-silica ekhiqizwa ngemva kokushiswa kwezinhlanganisela ze-silicon eziqukethwe kuphethiloli namafutha okugcoba, kanye negesi ye-silicone ekhishwa ukusetshenziswa okungalungile kwama-gaskets okuvalwa kwerabha ye-silicone izokwenza inzwa ye-oxygen ihluleke, ngakho-ke kufanele kusetshenziswe uphethiloli wekhwalithi enhle namafutha okugcoba. .
Lapho ulungisa, kuyadingeka ukukhetha kahle futhi ufake ama-gaskets enjoloba, ungasebenzisi ama-solvents nama-anti-stick agents ngaphandle kwalawo ashiwo umenzi ku-sensor, njll. Ngenxa yokusha kwenjini okungalungile, amadiphozi ekhabhoni akhiwa ebusweni inzwa ye-oxygen, noma uwoyela noma uthuli nezinye izinsalela zingeniswa ngaphakathi kwenzwa ye-oxygen, ezovimbela noma ivimbele umoya wangaphandle ungene ngaphakathi kwenzwa ye-oxygen, ukuze isignali yokuphuma kwenzwa ye-oxygen ingahambelani. I-ECU ayikwazi ukulungisa isilinganiso se-air-fuel ngesikhathi. Ukukhiqizwa kwamadiphozithi ekhabhoni kubonakala ngokuyinhloko njengokwenyuka kokusetshenziswa kukaphethiloli kanye nokwanda okuphawulekayo kokugxilisa ukungcola. Ngalesi sikhathi, uma i-sediment isusiwe, izobuyela emsebenzini ojwayelekile.
Ukuqhekeka kwe-Ceramic
I-ceramic yenzwa ye-oxygen iqinile futhi iyaphuka, futhi ukungqongqoza ngezinto eziqinile noma ukuvunguza ngokugeleza komoya okunamandla kungase kuyenze idilike futhi yehluleke. Ngakho-ke, kudingekile ukuba uqaphele ikakhulukazi lapho ubhekana nezinkinga futhi uzibuyisele ngesikhathi.
I-block wire ishisiwe
Intambo yokumelana ne-heater ishisiwe. Ngenzwa ye-oksijeni eshisayo, uma ucingo lokumelana nokushisa lushiswa, kunzima ukwenza inzwa ifinyelele izinga lokushisa elivamile lokusebenza futhi ilahlekelwe umsebenzi wayo.
Ukunqanyulwa komugqa
Umjikelezo wangaphakathi wenzwa ye-oxygen unqanyuliwe.
Indlela yokuhlola
Hlola ukumelana nokushisa
Khipha ipulaki yehhanisi lenzwa yomoya-mpilo, futhi usebenzise i-multimeter ukuze ulinganise ukumelana phakathi kwesigxobo se-heater nesigxobo sensimbi kutheminali yenzwa yomoya-mpilo. Inani lokumelana ngu-4-40Ω(bheka imiyalelo yemodeli ethile). Uma ingahlangabezani nendinganiso, buyisela inzwa ye-oxygen.
Ukulinganiswa kwevoltage yempendulo
Lapho kulinganiswa i-voltage yempendulo yenzwa yomoya-mpilo, ipulaki yehhanisi lenzwa yomoya-mpilo kufanele inqanyulwe, futhi ucingo oluncane kufanele ludonswe kutheminali yokukhiphayo yevoltheji yempendulo yenzwa yomoya-mpilo ngokomdwebo wesifunda wemodeli, futhi bese ixhunywa ipulaki yamahanisi. I-voltage yempendulo ingalinganiswa kusukela emugqeni oholayo phakathi nokusebenza kwenjini (amanye amamodeli angaphinda alinganise umthamo wempendulo yenzwa yomoya-mpilo kusukela kusokhethi yokuthola iphutha). Isibonelo, uchungechunge lwezimoto ezikhiqizwe i-Toyota Motor Company lungalinganisa i-voltage yempendulo yenzwa yomoya-mpilo ngokuqondile ukusuka kumatheminali we-OX1 noma we-OX2 kusokhethi yokuthola amaphutha).
Lapho ukala i-voltage yempendulo yenzwa ye-oxygen, kungcono kakhulu ukusebenzisa i-multimeter yohlobo lwesikhombi enobubanzi obuphansi (imvamisa engu-2V) kanye ne-impedance ephezulu (ukumelana kwangaphakathi okukhulu kuno-10MΩ). Izindlela eziqondile zokubona zimi kanje:
1. Vula injini ishise ibe yizinga lokushisa elivamile lokusebenza (noma ugijime ku-2500r/min ngemva kokuqala i-2min);
2. Xhuma ipeni elinegethivu le-multimeter voltage stop ku-E1 noma i-electrode eyinegethivu yebhethri kusokhethi yokuthola iphutha, kanye nepeni ephozithivu kujack ye-OX1 noma i-OX2 kusokhethi yokuthola amaphutha, noma enombolweni | kupulaki yezintambo zokubopha inzwa ye-oxygen.
3, vumela injini iqhubeke isebenza ngesivinini esingaba ngu-2500r/min, futhi uhlole ukuthi isikhombisi se-voltmeter singakwazi yini ukushwiba siye emuva naphambili phakathi kuka-0-1V, futhi sirekhode inani lokujika kwe-voltmeter pointer phakathi kwama-10s. Ngaphansi kwezimo ezijwayelekile, ngokuqhubeka kokulawulwa kwempendulo, i-voltage yempendulo yenzwa yomoya-mpilo izolokhu ishintsha ngaphezulu nangaphansi kuka-0.45V, futhi i-voltage yempendulo kufanele ishintshe izikhathi ezingekho ngaphansi kuka-8 phakathi kwama-10s.
Uma kungaphansi kwezikhathi ezingu-8, kusho ukuthi inzwa ye-oxygen noma isistimu yokulawula impendulo ayisebenzi kahle, okungenzeka kubangelwe ukunqwabelana kwekhabhoni ebusweni benzwa ye-oxygen, ukuze ukuzwela kuncishiswe. Kulokhu, injini kufanele isebenze ku-2500r/min cishe imizuzu emi-2 ukuze kukhishwe amadiphozithi e-carbon ebusweni benzwa ye-oxygen, bese uhlola i-voltage yempendulo. Uma isikhombisi se-voltmeter sisashintsha kancane ngemva kokukhishwa kwekhabhoni, sibonisa ukuthi inzwa ye-oxygen ilimele, noma isifunda sokulawula impendulo yekhompyutha sinephutha.
4, ukuhlolwa kombala kwenzwa ye-oxygen
Susa inzwa ye-oxygen epayipini lokukhipha umoya bese uhlola ukuthi imbobo yokukhipha umoya kundlu yezinzwa ivinjiwe futhi i-ceramic core yonakalisiwe. Uma konakele, buyisela inzwa ye-oxygen.
Amaphutha angaphinde anqunywe ngokubheka umbala wengxenye ephezulu yenzwa ye-oxygen:
1, phezulu okumpunga okukhanyayo: lona umbala ojwayelekile wenzwa yomoya-mpilo;
2, phezulu okumhlophe: okubangelwa ukungcoliswa kwe-silicon, inzwa ye-oxygen kumele ishintshwe ngalesi sikhathi;
I-3, i-brown top (njengoba kuboniswe kuMfanekiso 1) : okubangelwa ukungcoliswa komthofu, uma kubi kakhulu, kufanele futhi kuthathe indawo yenzwa ye-oxygen;
(4) Ingaphezulu elimnyama: okubangelwa ukufakwa kwekhabhoni, ngemva kokuqeda iphutha le-carbon deposition yenjini, ukufakwa kwe-carbon kwinzwa ye-oxygen ngokuvamile kungasuswa ngokuzenzakalelayo.
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